JPH072349B2 - Molding assembly equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a molding and assembling apparatus that molds a plurality of parts and assembles them in a mold.

[Background Art] As a technique for molding and assembling a plurality of parts in the same molding die, there is one called a composite molding die as shown in FIG. This is done by molding a plurality of parts 1 and 2 above and below the same axis, and after opening the side core 3, the parts 2 are moved in the axial direction by the sleeve 5 using the core pin 4 as a guide to assemble the two parts. However, with this structure, there is a restriction on the product shape, and it has been limited to a gear block in which target parts are coaxially fitted. Also, when it is taken out from the molding die,
Since the gear block is taken out as a single body, a positioning and feeding device is additionally required to automate the assembly in the next step, which is an obstacle to simplification of the assembly.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is not to limit a product shape and limit target parts, and to simplify assembly. It is an object of the present invention to provide a molding and assembling apparatus which can be assembled and which can be easily adapted to the automation of assembly in the next step.

DISCLOSURE OF THE INVENTION The present invention, therefore, provides a molding and assembling apparatus that molds a first part, molds a second part assembled to the first part, and assembles both parts in a mold. Forming an integral runner and forming it one by one
A forming part that connects the runners of the parts into an endless runner, a feeding means that intermittently sends out the first part, and a second part that is for forming the second part and is formed as a first part.
A side core is provided for assembling the parts and an assembling means for assembling the first part and the second part. The second part has the second part fixed side mold when the fixed mold body and the side core are opened. It is characterized in that an undercut portion for separating from the main body is formed,
The first part is connected by an endless runner, and the first part and the second part are assembled after moving from the molding position in the mold.

The present invention will be described in detail below with reference to the illustrated embodiments.
The figure shows two kinds of parts 1 and 2 molded in the same molding die in this embodiment. The part 1 is a Hertz switching lever in a timepiece, and the parts 2 and 2 are shafts 10 and 10 of the part 1. The planet gears are supported by each. Both the parts 2 and 2 are molded as individual parts and then assembled to the part 1. When the part 1 is molded, a runner 11, which is a so-called endless runner, is integrally molded to form each part 1. Although the components 1 are molded one by one, the components 1 are connected to each other at the runner 11, and thus are continuous.

FIG. 2 shows a schematic operation during assembly after molding in this embodiment. The part 1 is molded at a position higher than the parts 2 and 2, and is then fed in the direction a in the figure. After molding, the parts 2 and 2 are sent in the direction orthogonal to the feed direction of the part 1,
Then, the shaft 10 of the component 1 is fitted by being pushed up.

3 to 5 show members on the movable side of the molding die. In the figure, 9 is a runner for injection of molding resin, 31 is a part 2
, 32 is a slide core for molding the runner 11 which is an endless runner in the component 1, 33 is a side core for molding the component 1, and these are arranged on the receiving plate 36, and particularly, the slide core. The reference numeral 32 is arranged on the receiving plate 36 via the movable side mold plate 34 and the movable side mold plate 35. Further, in the figure, 40 is a movable side mounting plate, 41 and 42 are ejector pin plates, 43 is a stock plate, and the protruding pin 54 and the stock lift 51 for the movable side template 35 are attached to the stock plate 43, The protruding pin 53 for the component 1 is mounted on the ejector pin plate 42, the protruding pin 52 for the component 2 is mounted on the ejector pin plate 41, and the pilot pin 50 for positioning the component 1 when the component 1 and the component 2 are assembled is mounted on the movable side. It is held by a plate 40.

First, the molding of the component 1 will be described. As described above, the runner 11 for forming an endless runner is integrally molded through the resin inflow portion 19, and the molding of the runner 11 is as shown in FIGS. 6 to 9. To
It is performed in the slide core 32. The runner 11 molded at the same time as the part 1 is moved by the movement of the slide core 32, and the runner 11 formed at the same time as the molding of the next part 1 is molded so as to be integrally connected to the runner 11 already molded. The round hole forming pin 63 and the square hole forming pin 62 held by the fixed side mounting plate 60 are projected between the fixed side template 61 and the slide core 32, and the runner 11 has A round hole 13 and a square hole 12 are formed. After the molding and the mold opening, when the movable side mold plate 35 is lifted and the component 1 is pushed out upward, the slide core 32 is attached to the movable side mold plate 35 together with the hydraulic cylinder 8 for driving the slide core 32. As a result, the part 1 ascends while holding the runner 11 of the part 1. Driven by hydraulic cylinder 8, slide core
After 32 moves forward and then descends with the movable side mold plate 35,
The slide core 32 retreats, but at this time, as shown in FIG. 9, core pins 64 protruding from the fixed-side mold plate 61 are provided.
Is fitted into the round hole 13 of the runner 11,
11 and part 1 remain in the position they were sent. In this state, the square holes 12 of the runner 11 are fixed side template.
Since the runner 11 that coincides with the recess 69 in 61 and is formed at the same time when molding the next component 1 has the connecting portion 14 using the square hole 12 and the recess 69 at one end, The parts 1 to be successively molded are connected at the runner 11.

Here, when the material of the endless runner is polyacetal, the molded resin and the molten resin do not bond, so that the resin molded by the molten resin is sandwiched as shown in FIG. 7 (c). Cage,
Further, in order to make a part of the molded runner 11 into a cavity, the side wall is made longer than the resin inflow portion so as to cut out the resin, as is clear from FIG. 7 (e). Furthermore, the runner 11 is once ejected from the cavity,
Since it returns to the inside of the cavity, the sidewall has a large slope.

On the other hand, as shown in FIGS. 10 and 11, the component 2 is molded by the side core structure and the stationary mold body 70 in a side gate structure. Then, the mold opening is performed after the core pin 71 is pulled out first, and then, along with the movement of the side core 31, the shaft in the component 1 that is molded several cycles before.
Move directly below 10. At this time, the gate is cut off. The component 2 is provided with an undercut portion 21 as shown in FIG. 12 so that the component 2 is not brought to the fixed side mold body 70 side.

The parts 1 and 2 are assembled as shown in FIGS. 13 to 15. That is, the movement of the L dimension of the ejector pin plate 41 in FIG. 4 causes the component 2 to be fitted onto the shaft 10 of the component 1 as shown in FIG.
After this, the ejector pin plates 41, 42 and the stock plate 43 cooperate with each other to eject the parts 1 and 2 as shown in FIG. Due to only movement, the parts 1 and 2 are separated from the respective ejection pins 53 and 52 as shown in FIG. The forward movement of the slide core 32 described above is performed in the state shown in FIG.

As shown in FIGS. 16 and 17, the lower end portion of the shaft 10 of the component 1 has elasticity by forming a through hole 17, and an undercut portion 18 is formed on the outer peripheral surface thereof. Therefore, when the component 2 is fitted to the shaft 10, the undercut portion 18 prevents the component 2 from falling off. Instead of the through hole 17, as shown in FIG. 18, a notch 16
By providing the undercut portion 18, the undercut portion 18 may have elasticity.

It should be noted that FIG. 19 and FIG. 20 show that the part 1 having the runner 11 as an endless runner and connected thereto is fed into the sheet metal mold and the hoop material 90 is sequentially processed in the sheet metal mold. When removing the sheet metal part 91,
A sheet metal part 91 is press-fitted or caulked therein. Since the assembled parts can be continuously taken out at a predetermined interval and the endless part 1 is fed into the press die, the positioning is easy and the feeding speed is fast, so It has the advantage that there is no need to reduce the processing speed.

[Advantages of the Invention] As described above, in the present invention, the molding of the first component, the second component assembled to the first component, and the assembling of the both are performed in the mold, so that the number of assembly steps is increased. It is possible to obtain cost reduction by reducing the number of parts, and there is no mistake in inserting parts because they are assembled in the mold. Of course, the first part is equipped with runners that are connected to each other, and the second part is Since the side core for molding is moved to the assembly position with the first component, there is no limitation on the shape of the component, and it can be applied to the molding and assembly of various components. In addition, a fixed side mold body is provided with a side core that constitutes a molding die for the second part and that supplies the molded second part to an assembly position with the first part, and the second part includes a fixed mold body and a side core. Since the undercut portion for separating the second component from the fixed-side mold body when the mold is opened is formed, the second component can be moved to the assembly position with the first component using the side core. At the same time, when the side core is opened, the second part can be smoothly separated from the fixed-side mold body by the undercut portion, so that another device for separating the second part from the fixed-side mold body is not necessary at all. Since the assembled parts are connected to each other by the continuous runners connected to each other in the first part, Those which can easily cope with automation of assembly in extent.

[Brief description of drawings]

1 (a) and 1 (b) are a plan view and a front view of a component according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are a front view and a side view showing the basic operation of the molding and assembling. Fig. 3 is a plan view, Fig. 4 is a vertical sectional view of stairs, Fig. 5 is a lateral sectional view, and Fig. 6 (a).
(B) is a plan view and a transverse cross-sectional view of the first part molding portion, and FIGS. 7 (a) to (e) are plan views, a vertical cross-sectional view, a cross-sectional view taken along the line AA, and a cross-sectional view taken along the line BB. 8 is a vertical sectional view of the runner forming section, FIG. 9 is a vertical sectional view of the runner forming section during mold clamping, and FIG. 10 is a plan view of the second part forming section. Figures 11, (a) and (b) are transverse sectional views showing the operation of the runner forming section, and Figure 12 is an enlarged sectional view of the second part,
13 to 15 are cross-sectional views showing the assembling operation, and FIGS. 16 (a) and 16 (b) are front and bottom views of the shaft of the first component, and FIG.
FIG. 1 is a sectional view showing an assembled state of the first part and the second part,
FIG. 18 is a front view showing another example of the shaft, FIGS. 19 and 20 are plan views and side views showing an assembled state of a part having an endless runner and a sheet metal part, and FIGS. 21 (a) and (b). (C) is sectional drawing which shows operation | movement of a prior art example, 1 is a 1st component, 2
Is the second part, 11 is the runner that becomes an endless runner,
Reference numeral 31 denotes a side core for molding the second part, and 32 denotes a slide core for molding the runner of the first part and for moving.

Claims (1)

[Claims] 1. A forming and assembling apparatus for forming a first part, forming a second part to be assembled to the first part, and assembling the two parts in a mold, wherein a runner integral with the first part is formed. At the same time, the molding part for connecting the runners of the first part to be sequentially molded into an endless runner, the feeding means for intermittently feeding the first part, the fixed side mold body, and the molding die for the second part are provided. A side core that supplies the configured and molded second component to an assembly position with the first component, and an assembly means that assembles the first component and the second component, wherein the second component is a fixed mold body and a side core. A molding and assembling apparatus, characterized in that an undercut portion is formed for separating the second part from the fixed-side mold body when the mold is opened.